If your current text book gives you a mental block you can visit the following to go one level down, this will allow you to clear the mental block and get back up to your recommended textbook level.
Do not use this as the level and standard to attain, it's meant and pitched at A level standard, it is not good enough for your diploma or university level.
It is meant to serve as a "mental unblocker" if there is such a word....so that you can get right back on track.
Here are the following websites that have simplified the law.
http://www.e-lawresources.co.uk/
http://www.inbrief.co.uk/contract-law/accepting-a-contract.htm
http://www.legalmax.info/
http://www.youtube.com/watch?v=LHcGmPGK5d8&feature=rellist&playnext=1&list=PLF3F9C1C379413623
